Generally, you use RGB mode 300 pixels for printing, and then you can directly save it in JPG format. The printing effect is good with a four-color printer or a six-color printer, but you need to set the paper type and printing mode; if you want to print, it is best to use

Made in CMYK mode with 350 pixels, saved in JPG format, ready for printing.

Remember, you can use 0, 0, 0, 100 for black or use a color laser machine.